html,
body {
  height: 100%;
  background-color: #fff;
}
li,ul,input{
    margin: 0 ;
    padding: 0 ;
    list-style: none;
  }
  $color:#409eff;
  $color2:#E6A23C;
  .color2{
      color: $color2
  }
  .color{
      color: $color
  }
  //快选nav
  .curLi{
    background-color:$color;
    color: #fff;
  }